The metabolic process of fat goes through a protective cover, and there are mitochondria outside the protective cover, which can burn fat and convert it into energy. Fat enters the mitochondrial combustion chart and is consumed by the body, but large fat cells can't cross this barrier, so L-carnitine plays the role of porter! Take the oversized fat cells out of the shield bit by bit and give them to mitochondria to burn fat! L-carnitine is secreted by muscle tissue in your body, so during exercise, L-carnitine supplementation in vitro will accelerate this process!